PSY100H1 Chapter Notes - Chapter 5: Detection Theory, Auditory Cortex, Basilar Membrane
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PSY100H1 Full Course Notes
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Document Summary
Sensation: the sense organs" response to external stimuli and the transmission of these responses to the brain. Perception: the processing, organization, and interpretation of sensory signals; it results in an internal representation of the stimulus. Sensory coding: sensory organs" translations of stimuli"s physical properties into neural impulses (brain cannot process raw stimuli) Begins w/ transduction: process by which sensory receptors produce neural impulses when they receive physical/chemical stimulation. Sensory information is first sent to thalamus (except smell), then sent to cortex for interpretation. Psychophysics (weber and fechner) examines our psychological experiences of physical stimuli (e. g. how much physical energy is required for sense organs to detect stimulus, etc. ) Absolute threshold: minimum intensity of stimulation that must occur before you experience sensation; the stimulus intensity detected above chance. The level of intensity at which participants correctly detect a stimulus on 50% of the trials in which it is presented.
